Anti-friction bushing



T. R. PEREA-LL. Anti Friction Bushing.

(No Model.)

Patented May 31, 188i.

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Pf @flaw Urrnn STATES PATENT Ormea.

THOMAS R. FERRALL, OF BOSTON, ASSIGNOR TO HERBERT LOUD, OF EVERETT,MASSACHUSETTS.

ANTI-FRICTION BUSHING.

SPECIFICATION forming part of Letters Patent No. 242,290, dated May 81,1881.

' Application inea May 2,1881. (No moua.)

To all whom it may concern:

Be it known that I, THOMAS R. FERRALL, of Boston, in the county ofSuffolk and State of Massachusetts, have invented certain new and usefulImprovements in Anti-Frictional Bushings, of which the following is a.full, clear, and exact description. Y

This improved an ti-frictional bushing is composed in substance of aloose sleeve and a loose ring or rings surrounding the sleeve andconstructed to receive or carry a series of loose friction-rolls, incombination with a box or casing, all substantially as hereinafterdescribed, reference being had tothe accompanying plate of drawings, inwhich- Figure l is aface View ofone end of the box or casing. Fig. 2 isa construction on line 2 2, Fig. 1. Fig. 3 is a horizontal section online 3 3, Fig. 2, Fig. 4, aside elevation of the loose sleeve detached;Fig. 5, a sectional view, showing modication in construction of loosesleeve; Fig. 6, a side elevation of theloose sleeve with the ring uponit; Figs. 7, 8, 9, and 10, views in modification to be hereinafter morepartielllarly referred to.

In the drawings, A represents a cylindrical box or easing. This box, atone end, a, is open for its full diameter, and it is there provided withan external peripheral flange, b, and at its other end, c, it is closedonly in part, and has its central portion, d, open. The open end a ofthe box is closed by a plate, B, which has a circular opening, f,through it corresponding to and concentric with the opening d at theother end of the box. This plate is fastened to the box by screws, andin order to have. it iiush with the open and ilanged end a of the box,such end is suitably recessed or shouldered, as at g, to receive it.(See Fig. 2 more particularly.)

C is a metallic ring, sleeve, or hub, having a shoulder, h, atl eachend, and this hub or sleeve is conned by the shoulders of its two endsbetween the two ends a c of the box A, and exteriorly within said box ithas, intermediate of its length, a peripheral groove, l, which receivesa ring, D, which is free to move around upon it. This ring D has aseries of notches or recesses, m, in its outer periphery, arranged atregular and equal distances apart, and each notch is of a similarcircular shape, and each receives a friction-roll, E, all of acorresponding size and shape, and such as to bear against the innerperiphery of the box and the outer periphery of the hub or sleeve O andto be coulned against escape at their ends by the two end pla-tes B o ofthe box. The notched or recessed plate separates the friction-rolls fromeach other and so holds them. The shouldered sleeve or hub, arranged, asdescribed, between the two head or end plates of the box,

obviously cannot escape therefrom, and secures y a bearing upon an axlepin or shaft for the full thickness ofthe box or casing. The sleeve orhub is free to revolve in contact with the friction-rolls, thefriction-rolls in contact with the sleeve or hub and box, and therecessed ring upon the sleeve or hub, all as is obvious without furtherdescription.

This im proved frictional bushing is intended for pulley-sheaves,carriage-hubs, and other analogous purposes, and in such cases itsadvantages are plainly apparent, and therefore need no particularrecital herein.

The peripheral groove l of the hub may be secured in various ways-as,for instance, by grooving the hub, by making the hub transversely in twoparts and making cach of such parts of such forni that when put togetherthey will leave the desired groove, (see Fig. 2,) by shoulderin g thehub, and then by the application of a separate and distinct ring, n,leave the desired groove. (See Fig. 5.)

The recessed ring may be in several sections or parts in lieu of in onepiece, as described; but it is preferable to have it in one piece, whichof course necessitates that the hub or sleeve which receives it shouldbe in parts,

substantially as shown and described. lf in separate sections or parts,obviously they may be disposed, as described, about the hub withoutnecessarily separating or dividing it.

The grooved hub or sleeve O, in its action in combination with therecessed ring D, obviously simply holds such ring from moving along thelength of the hub, leaving it free to turn upon the same, and, as isplain, the same results may be similarly secured by grooving the inneredge of the ring and tonguing or Hangin g the hub to lit such groove.

The shouldered hub or sleeve C, as before stated, receives a bearingofthe frictional bushing equal to the full thickness of the box orcasing, and this result is in no sense dependent upon nor does it havethe least bearing or relation either to the action between the sleeveand recessed ring, or between the sleeve and the friction-rolls, and thereverse is also true, and although it obviously is preferable to use it,yet it is plain that the hub or sleeve could be arranged to be ooniinedsimply by its two ends without shoulders between the end plates of thebox.

The recessed ring, as shown, has its recesses open at its edge 5 butthese recesses may be closed for their whole periphery, so that theywill completely surround the friction-rolls; but as this construction,if no means be taken to obviate it, would prevent the l'rictional rollsfrom having a bearing upon the inside of the box, it is not desirable,nor is it necessary in any respect so fur as atl'ecting i'or the betteror worse the operation ofthe recessed ring D, to keep the friction-rollsseparate. However, it' a recessed ring ofthe modied construction abovedescribed be used, by simply grooving the periphery of the box or casingto receive the outer peiiphery of the ring the frictionrolls can begiven their desired bearing upon the box.

The loose frictiolrrolls E, as shown and described, are solid, and areconfined at each end from escape by the head or end plates of the box;but in lieu thereof they may be grooved about their periphery, and withthe recessed plate in such groove of each they are thus held from escapefrom either end of the box and the ring heldin its position. (See Figs.7 and S.) The solid ring, however, is preferable, as it is simple andcheap, ellicient and practical.

In Figs. 9 and l() is shown another way ot'- connecting thefriction-rolls to the loose ring; and it consists of pins o upon thering or plate and holes p in the rollers to receive such pins, the rollsbeing each side ot' the plate. It the ring and rolls be so connected,obviously thel loose sleeve, as has been described. This is also true insubstance when the rolls are grooved and the ring entering such groovesof the rolls, as has been before described.

As to Figs. 9 and 10, the sockets and pins of the rolls and ring may bereversedthat is, the pins be in the rolls and the sockets in thering-with the same results and elfeets.

More or less in number of the rings may be combined in one and the sameanti-frictional bushing-as, for instance, one at each end of thefriction-rolls, with a bearing of the rolls in each.

In anti-frictional bushings, &c., as well known, the combination of aloose sleeve and a series of loose frictionrolls is not new, andtherefore such is no part of this invention.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

l. In an anti-frictional bushing, thecolnbination of a loose sleeve, C,a loose ring or rings, I), and loose friction-rolls E, constructed andarranged together and in relation to eachother and as to a box orcasing, A, substantially as and for the purpose described.

2. In an anti-frictional bushing, a loose shouldered sleeve, C, incombination with a box or casing, A, all substantially as described, forthe purpose specified.

3. In an anti-frictional bushing, duc., a loose shouldered sleeve, C, aloose ring or rings, D, and loose friction-rolls E, constructed andarranged together and in relation to each other and as to a box orcasing substantially as and for the purpose described.

4. In anti-frietional bushings, the combina-- tion of a loose sleeve, C,having a peripheral groove, Z, a loose ring or rings, D, having rccessesm and entering such sleeve-groove l, and loose frictioirrolls E,arranged in said recesses, with a box or casing, A, all substantially asand lor the purpose described.

In testimony whereofl I have hereunto set my hand in the presence of twosubscribing witnesses.

THOMAS It. FERRALL. lVitnesses:

EDWIN W. BROWN, WM. S. BELLoWs.

